Electroproduction of kaons from the proton in a Regge-plus-resonance approach

Abstract

We present a Regge-plus-resonance (RPR) description of the p(e,e'K^+)Y processes (Y=Λ,Σ^0) in the resonance region. The background contributions to the RPR amplitude are constrained by the high-energy p(γ, K^+)Y data. As a result, the number of free model parameters in the resonance region is considerably reduced compared to typical effective-Lagrangian approaches. We compare a selection of RPR model variants, originally constructed to describe $KY$ photoproduction, with the world electroproduction database. The electromagnetic form factors of the intermediate N^*s and $Δ^*s are computed in the Bonn constituent-quark model. With this input, we find a reasonable description of the p(e,e'K^+)Y data without adding or readjusting any parameters. It is demonstrated that the electroproduction response functions are extremely useful for fine-tuning both the background and resonant contributions to the reaction dynamics.

14 pages, 7 figures; added discussion on double counting in the RPR model; accepted for publication in Phys. Lett. B

References in corpus (3)

• Measurement of the reaction gamma p --> K0 Sigma+ at photon energies up to 2.6 GeV
• Kaon photoproduction in a multipole approach
• Regge-plus-resonance treatment of the p(gamma,K^+)Sigma^0 and p(gamma,K^0)Sigma^+ reactions at forward kaon angles

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• P-wave excited baryons from pion- and photo-induced hyperon production
• Jülich-Bonn-Washington Model for Pion Electroproduction Multipoles
• Separated Structure Functions for Exclusive $K^{+}\Lambda$ and $K^{+}{\Sigma }^0$ Electroproduction at 5.5 GeV with CLAS
• Coupled-channel analysis of pion- and eta-electroproduction with the Jülich-Bonn-Washington model
• Induced polarization of Λ(1116) in kaon electroproduction
• Regge-plus-resonance predictions for kaon photoproduction from the neutron
• Beam-Recoil Transferred Polarization in $K^{+}Y$ Electroproduction in the Nucleon Resonance Region with CLAS12
• Magnetic interaction induced by the anomaly in kaon-photoproductions
• $K^{+}\Lambda$ electroproduction above the resonance region
• Bayesian model selection for electromagnetic kaon production on the nucleon
• Photon induced K$\Lambda$ production on the proton in the low energy region
• Kaon photoproduction from the deuteron in a Regge-plus-resonance approach